root/compat/unsetenv.c

DEFINITIONS

1. gitunsetenv

#include "../git-compat-util.h"

void gitunsetenv (const char *name)
{
#if !defined(__MINGW32__)
     extern char **environ;
#endif
     int src, dst;
     size_t nmln;

     nmln = strlen(name);

     for (src = dst = 0; environ[src]; ++src) {
          size_t enln;
          enln = strlen(environ[src]);
          if (enln > nmln) {
               /* might match, and can test for '=' safely */
               if (0 == strncmp (environ[src], name, nmln)
                   && '=' == environ[src][nmln])
                    /* matches, so skip */
                    continue;
          }
          environ[dst] = environ[src];
          ++dst;
     }
     environ[dst] = NULL;
}